Sodium Hydroxide → (S)-2-((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamido)propanoic acid

HRID 591109ノート

反応式

HRID 591109 の反応式
[C:1]([NH:24][C@@H:25]([CH3:30])[C:26]([O:28]C)=[O:27])(=[O:23])[CH2:2][CH2:3]/[CH:4]=[CH:5]\[CH2:6]/[CH:7]=[CH:8]\[CH2:9]/[CH:10]=[CH:11]\[CH2:12]/[CH:13]=[CH:14]\[CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21][CH3:22].[OH-].[Na+]>C1COCC1.O>[C:1]([NH:24][C@@H:25]([CH3:30])[C:26]([OH:28])=[O:27])(=[O:23])[CH2:2][CH2:3]/[CH:4]=[CH:5]\[CH2:6]/[CH:7]=[CH:8]\[CH2:9]/[CH:10]=[CH:11]\[CH2:12]/[CH:13]=[CH:14]\[CH2:15]/[CH:16]=[CH:17]\[CH2:18]/[CH:19]=[CH:20]\[CH2:21][CH3:22]

参加物

5

反応物 2

HCID 14798Sodium HydroxideHCID 9801860(S)-methyl 2-((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamido)propanoate

生成物 1

HCID 58416609(S)-2-((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamido)propanoic acid

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

(S)-methyl 2-((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamido)propanoate (2.0 g, 4.8 mmol) was taken up in THF (8 mL) along with 5M aqueous NaOH (5 mL) and stirred vigorously at room temperature for 3 h. The reaction mixture was diluted with water and concentrated under reduced pressure. Enough 6N HCl was then added to adjust the pH to 2. The resulting mixture was extracted with EtOAc. The combined organic layers were dried over Na2SO4, filtered and concentrated under reduced pressure to afford (S)-2-((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamido)propanoic acid. This was taken up in CH3CN (15 mL) along with N-Boc-L-threonine methyl ester (1.11 g, 4.78 mmol), HATU (2.0 g, 5.3 mmol) and DIEA (1.2 mL). The resulting reaction mixture was stirred at room temperature for 6 h and diluted with EtOAc. The organic layer was washed with NaHCO3, brine, dried over Na2SO4, filtered and concentrated under reduced pressure. Purification by silica gel chromatography (CH2Cl2) afforded (2S,3R)-methyl 2-(tert-butoxycarbonyl)-3-((S)-2-((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenamido)propanoyloxy)butanoate (1.0 g).

後処理

  1. concentrationconcentrated under reduced pressure
  2. additionEnough 6N HCl was then added
  3. extractionThe resulting mixture was extracted with EtOAc
  4. dry with materialThe combined organic layers were dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

出典と根拠

ORDレコード
ord-11cccded24974143b1bae5476c89da86
出典データセット
uspto-grants-2016_01
特許番号
US09238077B2

反応ノート

読み込み中…